Binary-divided arrays with intrisically overdamped Nb/Al-AlOx/Nb (SNIS) junctions driven at 70 GHz

Abstract

Binary-divided 1V arrays with 8192 overdamped Nb/Al-AlOx/Nb Josephson junctions, fabricated within a joint cooperation between INRIM and PTB, have been tested at 4.2 K and in a temperature range from 6 to 7 K. We measured the microwave-induced step amplitude and checked the uniformity of junction parameters and microwave response on the whole array and sub-segments.